Brake



April 23, 1935. l.. E. LA 5R15 9 BRAKE Filed Ma'y 31, 1932 'INI/ENTOR; LUDGER E. LA BRM-1 A TTORNEY Patented Apr. l23, 1935 l UNITED STATES PATENT OFFICE Bam Ludger E. La Brie, South Bend, Ind., assignor to Bendix Aviation Corporation, South Bend, Ind., a corporation of Delaware Application Mayer, I1932, serial No. 614,558

12 claims. (ci. iss-12) 1 This invention relates to brakes, and lmore ential flange 24 on which are positioned spaced particularly to disk brakes.v studs 26. 'I'hese studs support an axially .mov-

Although considerable eiort has been exable rotatable member 28 including two spaced pended on the production of disk brakes, no annular members 30 and 32, the inner peripheries 5 brake of this type has proved entirely satisfactory. of which are offset and suitably secured together 5 There appear to be several dimculties encountas by bolts 34 to form in eiect an annular fricered, among which is the complexity of the aption element substantially U-shaped in cross plying mechanism, the dimculty in radiating the section. heat from' the braking surfaces and thel low Positioned between the members 30 and 32 is l eiectiveness of a disk brake as compared to an the friction element including two corresponding l0 internal or external expanded brake. The pres,- annular members 36 and 88 having arranged ent invention aims to overcome these diiculties. upon their oppositely disposed faces suitable fric- An object of the invention is to provide a disk tion material adaptable for engagement with the brake, the several parts of which may be simple braking surfaces 30 and 32. `The annular mem- V stampings which do not 'require close working bers 36 `and 38 are provided with peripheral l5 45 une 6 6, Figure 1.

, limits. notches 40 for the reception of the torque-tak- AAnother object of the invention is to provide a ing plates 22 on the. ange 20. The inner perimdisk brake including a plurality of stampings eters of the members 38 and 40 are odset and upon which the required machine work is reduced ilanged as indicated at 42, and embracing these to aminimum. flanges are compression springs-or clips 44 ar- 20 A further object of the invention is to provide ranged in spaced'relation. Thes'e springs serve a disk brake in which adjustment due to wear is to retain and-return the friction disks or memavoided. bers 36 and 38 to their normal position. v

A feature ofthe invention is a rotatable mem'- Positioned between the friction members 36 ber substantially U-shaped in cross section and and 38 is a conduit 46. The conduit is secured in 25 a floating friction element adaptable to be spread a xed position by a suitable bracket A48 on the into engagement with the rotatable member by ange 20 of the disk I8. The conduit has posiaV cable. tioned therein a cable 50, the inner end of which Other objects and features of the invention is secured in a suitable bracket 52 spot-welded will be apparent from the following description, or otherwise secured to one of the friction mem- 30 taken in connection with the drawing which bers 36 or 38. The cable has positioned thereon form apart of this specication, and in which: between the bracket 52 and the inner end of Figure l is a side elevation of a brake structure, the conduit a return spring 54. partly in section, illustrating 'the invention as After the cable and conduit'have been assemapplied: A bled and secured in place and the component 35` Figure 2 is a vertical sectional view illustrating parts of the brake assembled together with the the brake as applied; wheel hub the studs 26 on the flange 24 center Figure 3 is a sectional view substantially on the rotating disk assembly readily and provide lmet-4, Figure l; a small clearance between the rotating disk and 40 Figure '4 is a sectional view substantially on the torque-taking members. Both the stationary 40 line .4-4.' Figure l: disks and the rotating disks are free to float ax- Figure 5 is a sectional view substantially on ially on the members 22 and studs 26, and the roline 5 5, Figure l; I g, tary discs may shift radially an amount permitted Figure ii is a sectional view substantially on `by the clearance 40.

,j It is generally conceded that the eifectiveness Referring to the drawing for more specific, of a disk brake is considerably lower than that details of the invention, III representan swivelof a servo shoe brake and a little lower than a ling knuckle having formed integral therewith a conventional two shoe non-servo brake. Howspindle I2 on which is mounted for rotation a ever, the braking results would probably be bethub I4. 'I'he hub has positioned thereon the' ter than that of the non-servo shoe brake due 50';

conventional wheel I6. Suitably secured te the to the fact that less movement of the hookup is knuckle I0 is a disk I8 having a lateral ilange 20 required to take up clearance making possible on the inner periphery of which is suitably sea greater multiplication .f the pedal pressure.

cured spaced torque-taking members 22. In operation,'force is applied to the cable' 6l 'I'he hub I4 has formed .thereon a circumferthrough suitable applying means, not shown. 55 i therefore, to

The applied force .tends to contract the ring, formed by the cable and its associated conduit positioned between the friction members 36 and 38,. causing these members to spread into engagement with the axially movable rotatable members and 32. Since these members are connected to a flange on the drum of the wheel, rotation of the wheel is effectively retarded. The torque imposed on the friction elements is taken through its connection with the'flange 20 on the disk Il. Upon release of the applied force the cable is returned to its normal position by means of the spring 54, and that part of the conduit between the stationary disk is returned to released position by its own initial tension, the cable' spring andthe disk return spring 44.

Although this invention has been described in connection with certain specific embodiments.

, the principles involved are susceptible of numerous other applications that will readily occur to persons skilled in the. art. The invention is, be limited only as indicatedby the scope of ,the appended claims. i

Having thus described the various features of the invention,` what I claim as new and desire to secure by Letters Patent is:

l. A brake comprising an axially movable yrotatable friction element including two annular.

disks having offset portions secured together to provide opposed braking surfaces.

2. A brake comprising an axially movable rotatable member includingcorresponding annular disks having offset portions on their inner perimeters.

3. A brake structure comprising an axially movable friction element including corresponding disks having flanges on their inner perimeters and compression4 springs embracing the nanges.

4. A brake structure comprising a friction element including corresponding annular members having offset portions on their inner perimeters terminating in flanges and clips embracing the flanges.

5. A brake structure comprising` a channeled axially movable rotatable member, an axially movable member positioned in the channel including corresponding annular members arranged in spaced relation, tension members securing the annular members together and expanding means between the axially `movable members.

-6. A brake comprising a fixed support, Va rotatable member associated therewith, an axially movable friction element carried by the rotatable member, a floating frictionv element on the fixed support and means for expanding the floating friction element including a circumferentially extending cable.

7; A brake,comprising` corresponding friction elements, tension members securing'the friction elements together and a 'cable looped 4between the friction elements having one end secured to the friction elements and its other end extending tangentially to the friction elements.

8. A brake comprising a xed support, a rotatable axially movable friction element associated therewith including spaced braking surfaces, an axially movable friction element adapted for cooperation with the braking surfaces, the

axially movable friction element including corresponding disks, tension members securing the disks together, a cable looped between the disks and means -for decreasing the diameter of the 'loop to effectively engage the axially movable looped between the members and a cable extending through the conduit Ahaving its inner end secured to the members. i

1l. A brake comprising a fixed support having a flange, a rotatable member associated therewith, a friction element axially movable on the rotatable member including corresponding members having offset portions secured together to retain the members in spaced relation, a friction element axially movable on the flange between the members including corresponding friction elements, means for yieldingly receiving the elements together and means for spreading the friction element including a cable looped between the friction element.

l2. A brake comprising a frictionelement including corresponding annular discs having oifset portions on their inner perimeters secured together, and rotatable means axially slidably engaging said offset portions, to transmit rotary movement to said element.

LUDGER E. LA BRIE.

cER'rmcATE or CORRECTION.

Parent No'. 1,998,675., Apriiza, 193s.

LUDGERE. LA BRIE.:

lt is hereby certified that error appears in the printed specification of the `above numbered' patent requiring correction as followsz. Page 2, second column, line 45,

cl'aim ll, for '.'recei\"`ing` "yread securing.. and that the said Letters Patent should be read with thiscorrec-tion therein that the ,sa'me may conform to the record of the case inthe Patent Office. Signed-and sealed this 5th day of November,y A. D. 1935.

. f Leslie Frazer (Seal) I AetingCommissioner ol Patents. 

